Molybdenum - ASCII Periodic Table of the Elements

ASCII PERIODIC TABLE OF THE ELEMENTS

  Mo

Relative atomic mass: 95.94 ± 0.02

English: Molybdenum
French: Molybdène
Croatian: Molibden
German: Molybdän
Italian: Molibdeno
Spanish: Molibdeno

Atomic number: 42
Group numbers: 6
Period: 5
Standard state (20 °C): solid

Discovery: 1778 Carl Wilhelm Scheele (SE)

Molybdenum was discovered by Carl William Scheele (SE) in 1778. The origin of the name comes from the Greek word 'molybdos' meaning 'lead'. It is a silvery white, very hard metal, but is softer and more ductile than tungsten. Molybdenum is found in the minerals molybdenite (MoS2) and wulfenite (MoO4Pb). Its alloys are used in aircraft, missiles and protective coatings in boiler plate.

Electronic configuration: [Kr] 4d⁵ 5s¹
Formal oxidation number: +6
Atomic radius: 136.3 pm

Electronegativities: 2.16
Thermal conductivity: 138 W/(m K)
Electrical resistivity (20 °C): 5.34 μΩcm

Melting point: 2623 °C
Boiling point: 4639 °C

Heat of fusion: 27.6 kJ/mol
Heat of vaporization: 589.9 kJ/mol
Heat of atomization: 656.55 kJ/mol